Question

How do I pass Javascript variable to and JSTL?

<script>

    var name = "john";  

    <jsp:setProperty name="emp" property="firstName" value=" "/>   // How do I set javascript variable(name) value here ?

    <c:set var="firstName" value=""/>  // How do I set javascript variable (name) value here ?     

  </script>

Answer 1

You need to send it as a request parameter. One of the ways is populating a hidden input field.

<script>document.getElementById('firstName').value = 'john';</script>
<input type="hidden" id="firstName" name="firstName">

This way you can get it in the server side as request parameter when the form is been submitted.

<jsp:setProperty name="emp" property="firstName" value="${param.firstName}" />

An alternative way is using Ajax, but that’s a completely new story/answer at its own.

See also:

• Communication between Java/JSP/JSF and JavaScript
• Your previous question regarding the subject
• Your other previous question regarding the subject

_{If you can’t seem to find your previously asked questions back, head to your user profile!}